p-values: What they are and how to interpret them



This StatQuest is all about interpreting p-values. You’ve seen them online or in publications, or heard about them, whispered in dark, rave filled dance clubs, but you’ve never understood what they were all about. This ‘Quest is here to explain everything you wanted to know about how to interpret p-values. Bam!!!

To learn how the p-values were calculated in this video, see…

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0:00 Awesome song and introduction
0:17 Conceptual motivation for p-values
4:32 p-value defined
7:07 Different thresholds for a statistically significant p-value
9:16 p-values and hypothesis testing
9:47 p-values do not measure effect size

#statquest #pvalue

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49 Comments

  1. Super BAM!!!
    I came here from the Covariance and Correlation video. To be honest, I didn't follow the playlist in a linear fashion but rather jumbled, but then I have a question.

    I'm personally not really good at mathematics, so when I hear that smaller p-value actually means the probability of the data occurring outside predicted value is small, I find quite hard to follow. To my ears, I can comprehend something like: "The analyst is 99.8% sure that any given gene Y value will correspond to the gene X value (assuming positive correlation)" easier. To put it differently:
    A. "If gene Y is sitting at 60, we are 99.8% sure that gene X will also be sitting around 60"
    B. "If gene Y is sitting at 60, there is only 0.002% chance for gene X to be sitting outside 60"

    Would reporting the p-value like in the (A) option affect how people perceive our calculation or analysis result?

  2. why you don'y say about calculating p-values…? i wait whole video for explain i realize p value is calculatied by several pdf after i search the internet…

  3. Sir, I hope that both sides of your pillow are cold tonight. You covered two chapters worth of content for my master's program in under 15 minutes and explained everything in simple, clear terms. THANK YOU!

  4. I don't like to complaint, I'm not complaining but I'm asking: is there any kind of gathering/info sharing place for students to discus how the info material is valuable and useful while how teachers make it hard like hated garbage? I'm looking for a place to deflate my garbage experience and also to know about others, statistics is telling a lie based on a little truth, yet my grades are fucked for telling truth base on lies. Something in the definition is not right

  5. سبحان الله العظيم❤

    سبحان الخالق❤

    سبحان المصور القهار❤

    سبحانالودود اللطيف ❤

    سبحان الهادي الكريم❤

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